It's easy to use LED Matrices with Python and the Adafruit CircuitPython HT16K33 library.  This library allows you to easily write Python code to control the display.

We'll cover how to wire the Bargraph to your Raspberry Pi. First assemble your Bargraph.

Since there's dozens of Linux computers/boards you can use we will show wiring for Raspberry Pi. For other platforms, please visit the guide for CircuitPython on Linux to see whether your platform is supported

Connect the Bargraph as shown below to your Raspberry Pi.

  • Raspberry Pi 3.3V to Bargraph VIN
  • Raspberry Pi GND to Bargraph GND
  • Raspberry Pi SCL to Bargraph SCL
  • Raspberry Pi SDA to Bargraph SDA


You'll need to install the Adafruit_Blinka library that provides the CircuitPython support in Python. This may also require enabling I2C on your platform and verifying you are running Python 3. Since each platform is a little different, and Linux changes often, please visit the CircuitPython on Linux guide to get your computer ready!

Python Installation of HT16K33 Library

Once that's done, from your command line run the following command:

  • pip3 install adafruit-circuitpython-ht16k33

If your default Python is version 3 you may need to run 'pip' instead. Just make sure you aren't trying to use CircuitPython on Python 2.x, it isn't supported!

If that complains about pip3 not being installed, then run this first to install it:

  • sudo apt-get install python3-pip

That's it. You should be ready to go.

This guide was first published on Jul 29, 2012. It was last updated on Feb 27, 2024.

This page (Python Wiring and Setup) was last updated on Jan 13, 2020.

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